Radial drilling machine



R. H. RAUSCH RADIAL DRILLING MACHINE April 27,1926. 1,582,688

Filed Feb. 8, 1924' A TTORIIEY Patentedfiapr. 27, i925.

stares PAIEZN'I.

inane-as FFEQE.

ROSWELL H. RAUSCH, OF PLAINFIELD, NEW JERSEY, ASSIGNGR T0 NILES-BEMENT: POND COMPANY, OF NEW YORK, N. Y., A OGRPOR-ATION OF NEW JERSEY.

RADIAL JQRILLING MACHINE.

Application filed February 8, 1824. Serial No. 691,411.

To all whom it may concern:

-Be it known that I, ROSWELL H. Hanson, a citizen of the United States, residing at Plainfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in Radial Drilling Machines, of which the following is a specification.

This invention relates to radial drilling machines of the type having a vertically divided column and a horizontal drill supporting arm vertically adjustably mounted between the parts of the column. Such a machine is shown, for example, in Patents Nos. 1,296,863 and 1,365,009 to IV. I. Sears. In these machines, a motor and change speed gearing are mounted on the arm at the rear side of the column and are adapted 'through an arm shaft to drive the drill spindle'supported in a saddle slidable on the arm at the front side of the column. When such a machine is to be used in close quarters requiring a conservation of space, it has been found that the projecting of the gear box and motor to an unnecessary distance beyond the column is objectionable. It will be understood that the construction permits the swinging adjustment of the arm about the column axis and sufficient space must of course be allowed at the rear of the column to permit clear horizontal swinging movement of the gear box and motor. The mechanism comprising the present invention is adapted to considerably shorten this overhanging portion of the arm and the primary object. of the invention is to provide an improved radial drilling machine embodying this novel feature.

As shown in the accompanying'drawing, I preferably shorten the overhanging rearward portion ofthe arm by rearranging'the change speed gearing in a manner to house the same within the column. thus entirely eliminating the overhanging gear box shown in the above mentioned patents. In my improved drilling machine, the motor is the only rearwardly overhanging portion of the arm, the change speed gearing being supported on the arm entirely within the column. It is therefore another object of my invention to provide a radial drilling machine. of the divided column type with drill operating means including change speed gearing mounted on the arm between the divided parts of the column.

A further object of my invention is to provide in a radial drill of the type just defined, means including a nut rotatable on a screw within the column for adjusting the arm vertically, means including a clutch for 'operatively connecting the motor to the nut and means mounted on the spindle side of the arm and adjacent the column for shiftmg the said change speed gearing to vary the speed imparted to the arm shaft from the motor and for shifting the said clutch. lYith the above and other objects in view, my invention consists in the features of construction and operation set forth in the following specification and. illustrated in the accompanying drawing. In such drawing annexed hereto and forming a part'of this specification, I have shown one embodiment of my invention but it will be understood that the invention can be otherwise embodied and that the drawing is not to be construed as defining or limiting the scope of the invention, the claims appended to this specification being relied upon for that purpose. 1

Referring to the figures of the drawing: Figure 1 is an elevational view of a radial drilling machine embodying my invention. Fig. 2 is an enlarged fragmentary vertical sectional view through the arm and column. Fig. 3 is a sectional plan view taken on line 33 of Fig. 2.

Fig. I is a view taken on line ll of Fig. 1.

As concerns the general arrangement of parts of the machine illustrated in the accompanying drawing, the same are similar to those shown and described in the above cited patents. As illustrated, the machine comprises a base, preferably made up of two parts 1 and 2. Mounted on the part 2 of the base is a column 8 which is divided vertically into two similar parts 3 and The column can be moved with respect to the base about a vertical pivotal axis and preferably the column is provided at 4 with a broad supporting surface which engages a corresponding surface on the base part 2. A ball bearing 5 is provided at or near the center of the column which assists in supporting the column, and there is provided a roller bearing 6 which serves to hold the column in position and prevent its movement away from the vertical. A suitable clamping mechanism is adapted-to be operated by a lever 7. hen the column is clamped by the said clamping mechanism, the supporting surface 1 engages the corresponding surface of the base part 2, thus providing a broad flat direct and rigid support for the column. This column clamping mechanism is illustrated and described in Patent No. 1,376,169.

As illustrated, the drill supporting arm comprises a drill saddle supportingportion 8, a motor supporting portion 9, and an intermediate portion 10 between the parts 3 and 3 ot' the column. It will be understood that the arm can be an integral member as illustrated in the accompanying drawing or formed of separate members secured together, as shown in Patent IZo. 1.3651109. The intermediate portion 10 ot the arm is guided for vertical movement between the two parts 3 and 3" of the column. The arm has inclined surtaces 11, 11 engaging similarly inclined surfaces on the corresponding edges of the column parts. it the other side of the column, there are provided gibs 12, 12 having inclined surfaces which engage sin'iilarly inclined surfaces on the corresponding edges of the column parts. Bolts 13, 13 are provided for holding the gibs 12, 12 in place and these bolts are adjusted to bring the gihs into working engagement with the corresponding surfaces of the column parts without however etlecting such a clamoing action as would interfere with the tree vertical movement of the arm.

Slidahlv mounted on the portion S of the arm is a saddle 1-t carrying a head provided with a rotatable drill spindle 15. An arm shaft 16 extending along this portion of the armis operatively connected to the drill spindle and extends into the column. The arm is supported by a screw 17 hung from the top of the column and extending down wardh into the column. A rotary nut 18 threadcdlv engages the screw within a hearing 19 on the arm, antitriction means 20 being provided between the hearing and a supporting tlange on the lower end of the nut. The nut is adapted to be rotated. as hereinafter described, b v a worm gear 21 lceved to the upper end thereof.

The arm shaft 16 and nut 18 are adapted to be rotated by a motor mounted on the. portion 9 of the arm. The driving connections from the motor to the shaft 16 and nut 18 are supported on the intermediate portion 10 of the arm and are housed between the two parts 3" and 3" of the column. This mechanism will now be describei The arm shat't 16 extends into the column and is supported therein in bearings 23 and 24: on the intermediate portion 10 of the arm. Two parallel shafts 25 and 26 are -mounted in like manner'a'bove the arm shaft,

the shaft 25 being directly connected to the motor armature shaft at 27. Splined to the shaft 25 isa cluster 01 three gears 2 and 30 adapted to cooperate respectively with gears 31, 32 and 33 keyed to the intermediate shaft 26. tiplined to the arm shaft is a similar cluster of three gears 34, 3-35 and 36 adapted to cooperate respectively with gears 31, 32 and also secured on the intermediate sha'tt 26. 13v shifting the two gear clusters to their dilterent driving positions, the arm shatt can be driven from the motor at nine diti'erent speeds.

The means for shifting the gear clusters just described is preferably located in a position most convenient to the operator. The gear cluster 28, 2-) and 30 is provided with an annular groove within which engages a vol(e 38 mounted on a sliding rod 3!) extending outwardly toward the saddle H. The outer end'ot this rod toothed and is en gaged by a gear -ltl on a shaft -.l-1 extending forwardly in the arm and provided with an operating lever 12 thereon. Movement ol the lever over the arcuate plate 4- 3 is adapted to rotate the gear 10 and shift the gear cluster along its shatt. A detent 1-1- on the lever is adapted to cooperate with holes 45, -16 and 17 in the plate to hold the gear cluster respectively in driving engagement with gears 31, 32 and 3 llith the detent in either of holes 18, the gears will be held in a neutral and non-driving position.

The means for shifting the gear cluster 31, and 36 is similar to that just described. A yoke 19 on a sliding rod engages within an annular groove in this gear cluster. A gear 51 on a shaft in the arm in mesh with rack teeth on this rod. An operating lever 53 on the shaft is movable over an arcuate plate at in the gear shitting operation. A detent 55 on the lever is adapted to cooperate with holes so, 51' and 58 in the plate to hold the gear cluster rcspcctivelv in driving engagement with the gears 31,- 32 and ST. \Yith the deteut in either of holes 59, the gears will be held in a neutral and non-driving position.

The driving connection from the motor to the worm gear 21 on the nut 19 comprises a clutch tit) splined to the shaft and adapted to be engaged with a worm (31 loose on the shaft and in mesh with the worm gear. l1 engaging the clutch with the worm, the nut can be rotated in one direction or the other from the motor to elevate or lower the arm. The clutch shitting means comprises a vole- (52 mounted on a sliding rod 6 and engaging within an annular groove in the clutch. it pinion 61 on a tubular shalt (:35 rotatahlv mounted on the shaft -11 is in. mesh with rack teeth on this rod. An operating lever (36 is secured to the shaft (35 and is mova le to two positions. \Yith the detent (37 en gaged in the hole 68, the clutch is engaged with, the worm and with the detent engaged lif in the hole 69, the clutch is disengaged therefrom. I

The invention as described and illustrated comprises a radial drilling machine particularly adapted for use where lack of space requires that the machine be constructed and operated as compactly as possible. Such r quirement is essential for example where a battery of such machines are being operated in close proximity. The machine illustrated can be operated in very close quarters'since, aside from the radial drill supporting arm which extends over the work support, the driving' inc-tor is the only part of the machine projecting outwardly from the column. Furthermore, due to the novel methot of mounting and housing the change speed gearing and arm elevating mechanism within the column, none of the advantages of this type or radial drill, as shown'in the patents above mentioned, have been sacri- V ficed. The novel mechanism illustrated also includes means most convenient to the operators usual position at the machine for controlling both the change speed gearing and the arm elevating mechanism.

iVhat I claim is:

1. In a radial drillin machine, the combination of a base, a ertically divided column mounted thereon, a horizontal arm vertically adjustably mounted between the parts of the column, drill spindle supporting mechanism slidably mounted on a por tion of the arm at one side of the column, a spindle operating shaft extending along such portion of the arm and into the column, a power shaft, and means including change speed gearing on the arm within the column for operatively connecting the power shaft and arm shaft.

2. In a radial drilling machine, the combination of base, a vertically divided column mounted thereon, a horizontal arm vertically adjustably mounted between the parts of the column, drill spindle supporting mechanism slidably mounted on a portion of the arm at one side of the column, a spindle ope-rating shaft extending along such portion ofthe arm and into the column, a motor adjacent the column, means includin change speed gearing on the arm within the column for operatively connecting the motor and shatt', screw threaded means for adjusting the arm vertically, and means providing an operative connection from the motor to the screw threaded means tor elevating and lowering the arm.

23. In a radial drilling machine, theconibination of a base, a vertically. divided column mounted thereon, a horizontal arm vertically adjustably mounted between the parts'ot the column, drill epmdle support ing mechanism slidably mounted on a portion of the arm at one side 01" tie column,

spindle operating shatt extending along such portion of the arm and into the column, a motor on th arm at the other side of the column, and change speed gearing on the arm within the column for operatively connecting the motor and shaft.

4-. In a radial drilling machine, the com bination of a base, a vertically divided column mounted thereon, a horizontal arm vertically adjustably mounted between the parts of the column, drill spindle supporting mechanism slidably mounted on a porion of the arm at one side of the column, a spindle operating shaft extending along such portion of the arm and into the column, a'motor on the arm at the other side of the column, change speed gearing on the arm within the column for operatively connecting the motor and shaft, and means mounted on the drill spindle side of the arm and adjacent the column for shifting the said gearing to vary the speed imparted to the shaft from the motor.

5. In a radial drilling machine, the combination of a base, a vertically divided column mounted thereon, a horizontal arm mounted between the parts of the column, screw threaded means "for adjusting the arm vertically, drill spindle supporting mechanism slidably mounted on a portion of the arm at one side of the column, a spindle operating shaft extending along such portion of the arm and into the column, a motor on the arm at the other side of the column, change speed gearing on the arm within the column tor operatively connectin the motor and shaft, and means providing an operative connection between the motor and screw threaded means whereby the arm can be adjusted vertically by the motor.

6. In a radial drilling machine, the coinbination of a base, a vertically divided column mounted thereon, a horizontal arm mounted between the parts of the column, a vertically extending screw within the column, a nut supporting the arm and threadedly engaging the screw, drill spindle supporting mechanism slid-ably mounted on a portion'ot the arm at one side of the column, a spindle operating shaft extending along such portion of the arm and into the column, a motor on the arm at the other side or the column, change speed gearing on the arm within the column for operi tively connecting the motor and shaft, and means providing an operative connect-ion between the motor and nut whereby the arm can be adjusted vertically by the motor,

T. In a radial drilling machine, the conibination of a base, a vertically divided column mounted thereon, a horizontal arm mounted between the parts or the column,

a vertically extending screw within the col-- unin, a nut supporting thearm and thread edly engaging the screw, drill. spindle supporting mechanism slidably mounted on a portion of the arm at one side of the column, a spindle operating shaft extending along such portion of the arm and into the column. a motor on the arm at the other side of the column, change speed gearing on the arm Within the column for operatively connecting the motor and shaft, means inclut ing a clutch providing an operative connection between the motor and nut. whereby the arm can be adjusted vertically by the motor, and means mounted on the drill spindle side of the arm and adjacent the column for shifting the said gearing to vary the speed imparted to the shaft from the motor and 15 for shifting the said clutch.

In testimony whereof, I hereto aflix my signature.

ROSlVELL H. RAUSCH. 

